Telephone dial attachment,申请号US19430484526-传众专利搜索

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发明名称	Telephone dial attachment
摘要
申请公布号	US2420070(A)	申请公布日期	1947.05.06
申请号	US19430484526	申请日期	1943.04.26
申请人	STEWART W. CHAFFEE	发明人	FARNHAM EVELYN CLIFFORD
分类号	H04M1/22	主分类号	H04M1/22
代理机构		代理人
主权项
地址

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